Tire having tread of specified rubber composition and related methods
AssigneeBridgestone Americas Tire Operations, LLC
InventorJustin James Styer
Life of this patent
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Abstract
Disclosed herein are tires having a tread with improved stiffness made from a rubber composition of specified ingredients including an elastomer component, a resin component including a terpene phenol resin having a specified hydroxyl value and a DCPD-based resin, a filler component including reinforcing silica filler and carbon black, optionally a liquid plasticizer, and a cure package. Also disclosed are methods for improving the stiffness of a tire tread by using a resin component comprising a terpene phenol resin having a specified hydroxyl value and a DCPD-based resin in a rubber composition comprising an elastomer component, a filler component including reinforcing silica filler and carbon black, optionally a liquid plasticizer, and a cure package.
Claims18
A tire comprising a tread made from a rubber composition comprising:
- 100 parts of an elastomer component including at least one rubber selected from the group consisting of styrene-butadiene copolymer, polybutadiene, natural rubber, and polyisoprene, wherein the elastomer component includes more than 60 parts of polybutadiene having a cis-bond content of at least 95% and a Tg of less than −101° C.,
- 20 to 60 phr of a resin component comprising (i) a terpene phenol resin having a hydroxyl value of 80 or greater and (ii) a DCPD-based resin that is not hydrogenated and that has a minority by weight of DCPD monomers, wherein the terpene phenol resin (i) comprises a majority by weight of the resin component,
- a filler component comprising
- 91 to 140 phr of a reinforcing silica filler, and
- 1 to 20 phr of a carbon black filler,
- wherein the filler component contains 0 phr of titanium oxide,
- 0 to 30 phr of a liquid plasticizer, and
- a cure package.
A tire comprising a tread made from a tread rubber composition comprising
- 100 parts of an elastomer component including at least one rubber selected from the group consisting of styrene-butadiene copolymer, polybutadiene, natural rubber, and polyisoprene, wherein more than 60 parts of the elastomer component comprises polybutadiene having a cis-bond content of at least 95% and a Tg of less than −101° C.,
- 20 to 60 phr of a resin component comprising (i) a terpene phenol resin having a hydroxyl value of 80 or greater and (ii) a DCPD-based resin that is not hydrogenated and that has a minority by weight of DCPD monomers, wherein the terpene phenol resin (i) comprises a majority by weight of the resin component,
- a filler component comprising
- 91 to 140 phr of a reinforcing silica filler, and
- 1 to 20 phr of a carbon black filler,
- wherein the filler component contains 0 phr of titanium oxide,
- 0 to 30 phr of a liquid plasticizer, and
- a cure package.
Dependencies are inferred from the claim text.